Transformer oil tank



June 12, 1928.

.L KUBLER TRANSFORMER OIL TANK Filed Oct. 5. 1922 Patented June 12,1928.

JOHANN KUBLER, OF BADEN, SWITZERLAND. ASSIGNOR TO AKTIENGESELLSCHAFTBROWN, BOVER AND CE.,

OF BADEN, SWITZERLAND. y

TRANSFORMER OIL TANK'.

Application filed October `5, 1922, Serial N0.,592,Gl3, and inSwitzerland October 15, 1921.y

Those constructions have various drawi backs, of which may be mentioned,the hin- 'F edges and connected together'in pairs in an oil-tightmanner, and the several pockets being connected in communication withone another and the tank by means of flanges or bushings affixed to thepla-tes about the communicating apertures in an oil-tight manner.

An embodiment of this invention is illustrated in the accompanyingdrawings in which:

Figure l is a diagrammatic verticaly section of a transformer oil-boxaccording to tained from the illustrative example shown y in thedrawing. In this, the reference character a designates the transformerolil box or tank, the same having flanges o formed thereon by pressing,welding or riveting, at the desired locations andaifording apertures forthe passage of oil. The cooling pockets c are each composed of two sheetmetal plates welded together at the edges d, whereby theparallel-portions of the plates are spaced apart to afford thin oilcirculating chambers of .Y substantial .areal These plates are providedwithconnecting fianges or bushings e which `afford oil passages throughthe plates and reinforce the plates about such passages. The dimensionsof these pocket members preferably `are such j that they coversubstantially the area of the respective sides `of the `transformer tankto which they are to be connected, and the location of the flanges orbushings fe is pref-v erably suchthat theoil "passages therethroughalign withthe oil passages through the passages. of the tank walls. Thepocket members as thus constructed are mounted on the tank by oil tightconnections which perform the double function ofsupporting the pocketson the tank and afford- 'ing communicating flow.. connections be-y tweenthe interior of the tank and the respective pocket members.l The form ofcon-y nections may be of any sort appropriate to accomplish theseresults.` i. a i

As shown in Figs. 3 and 4, the flanges e are connected together inanoil-tight manner by means of right and left hand screwf threadedradiator nipples fwith the inten` position'of packing or gasketsbetweenthe flanges of juxtaposed pocket members.

As shown in Figs. 5 and6, a short piece of tube g is screwed, solderedor welded in each pair of oppositely situated flanges of sert-ed throughthe tube orifices of the several pockets, and by their means the flangesare pressed together in an oil-tight manner.

As shown in Figs. 7 and 8, the flanges e of each cooling pocket o aremade in one piece, and are formed with radial apertures i for thepassage of the oil into the cooling pockets. The several cooling pocketsare pressed together in an oil-tight manner lone and. the Isame pocket,and bolts it are in-` y against the flange of the tank a by means ofthrough bolts 71, with the interposition of packing rings.

rl`he outer closure of the oil passage aperture may be formed orconstituted by a pocket which is provided with flanges e on one sideonly. A pocket of this kind would however be a separate construction andbe capable neither of beingchanged nor removed nor extended. For thisreason it is preferred to construct all the pockets alike, and to closethe outer aperture by means of a screw-onlid m or a bolted lid n asshown in the drawings.

In this fashion, as many as desired ol the pocket members may beassembled in collateral relationship, extending parallel to the sides ofthe tanks, so that the entire assembly conforms in general to thecontour and wall dimensions of the tank. The fianges or bosses econstitute spacing members between juxtaposed pocket members, so that anintervening air circulation space is aforded, the width of which spacemay be governed by the thickness of the gaskets inserted between theflanges of the juxtaposed pocket members. These air circulating spacesare open' to the surrounding atmosphere at the top, bottom and ends ofthe pocket members, so that free circulation of cooling air over theentire wall areas of the pocket members is permitted. By virtue of thecommunicating passages afforded through the connecting flanges, anautomatic circulation of oil is accommodated, from the ytop of thetransformer tank into the upper portions of the pocket members, downthrough the pocket members as the oil cools, and back into the tank atthe bottom. By virtue of the location of the connections adjacent thecorners of the pocket members, they are afforded` very stable support onthe tank, in spite'of their vextensive area, and, consequently, they maybe formed of quite thin plates which expedite the conduction of heatfrom the contained oil to the external air.

It will beobserved, therefore, that the invention permits of a verymaterial simplication in they construction of air cooled transformercontainers, as any desired amount of cooling surface may be provided byuse of pocket members of a standardized construction. Thus a transformertank of standardized size and construction may be equipped to meet therequirements of any of different climatic conditions, a larger number ofcooling pockets being employed if the apparatus is to he installed in ahot climate, and a smaller number if 'for a cooler climate.

lVhat I claim is:-

1. Apparatus of the class described comprising, in combination with anoil tank, a plurality of similar pocket members coliformingapproximately in area and contour with a Wall of the tank, said pocketmembers being,r disposed in collateral relationship with one another andwith said wall of the tank and being spaced trom one another and fromthe tank wall to afford intervening,lr air circulation spaces, meansconnecting said pocket members to one another and to the tank atdistributed points adjacent their top and bottom margins, said tank andpocket Incinbers beingr provided with comnnmicating,r passages in theirupper and lower parts, and said intervening air spaces havingcomunication with surrounding atmosphere at the margins of the pocketmembers.

2. In apparatus of the character dcscribed, a receptacle havingr fluidinlet and outlet openings, and a cooling unit disposed in proximity to awall of said receptacle and providinpr with thc latter by Way of saidopenings a closed circulatinpr circuit ior fluid; said unit comprising,ya plurality of superimposed spaced radiating elements each comprising apair of complementary plates fitted and secured together at theirmarginal portions and formed to provide a chamber forming part of suchcircuit, the plates bcingr provided with flanged openings registeringwith each other and with one oi said receptacle openings, and meansextending through the flanges at the plate openings and into fastening:relation with said receptacle wall at said receptacle opening andoperatink;r to hold said unit in assembled relation with respect to saidreceptacle and to hold said elements comprising said unit in assembledrelation with respect to themselves.

In testimony whereof I have signed my name to this specification.

JOHANN KUBLER

